During the period of ejection in the cardiac cycle, the atrioventricular valves are __________ and the semilunar valves are __________ .
a. closed, closed
b. closed, open
c. open, closed
d. open, open
Answer: B
During the period of ejection in the cardiac cycle, the atrioventricular valves are __________ and the semilunar valves are __________ .
a. closed, closed
b. closed, open
c. open, closed
d. open, open